Work your brain! Between 2 and 3 pounds of wonder.it controls everything we say.
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Work your brain!
Between 2 and 3pounds of wonder，it controlseverything we say，do or think，whowe are and what we care about. The way we walk or laugh or figure out things. Whatwe like and the talents we possess. How we see and talk and run and jump andprocess our food.
The brain uses 20percent of our body's oxygen and 20 percent of its blood. Somewhere within itsprotein，fat, 100,000 miles ofblood vessels and 100 billion nerve cells，it helps usremember where we put our gym shoes. Change our temperature so we don't diebecause of the heat or cold. Speed us up or slow us down. Help us choosebetween orange juice or orangeflavored drinks.
Its intricacies(复杂性)are stunning，far beyond anything most of us can imagine. To keep this work of artas polished(有光泽的) as possible we need to eat right，exercise and keep mentally stimulated(刺激)．
Good nutritionhelps brain cells communicate with each other. Exercise stimulates a hormone(荷尔蒙)in our brain that improves memory. Mentalstimulation keeps you sharp even as you age.
“It's very important that we tell people to bephysically active and mentally active，”said neurologist Malcolm Stewart.
“People cannot stop aging，but you're able to reduce the damage；you're able to keep the function up.”
Following areDr.Stewart's advice for improving brain health：
| Nutrition | Avoid fast food. Follow the old adage(格言，谚语)：For breakfast，eat like a king；for lunch，like a queen；for supper，like a beggar. |
| Exercise | Do a combination of stretching aerobic and musclestrengthening every day. |
| Mental games | Try to have a sense of hope about the future. Do puzzles. Listen to music. Reach out to others to make their lives better. |
1.The purpose of the author in writing thispassage is to ______.
A. inform us howthe brain works
B. give us adviceon how to keep the brain healthy
C. tell us that thebrain plays an important role in our lives
D. show how specialthe brain is to us
2.The word “stunning” inParagraph 5 means ______.
A. interesting B. strange C. significant D. amazing
3. According to the text，more exercise ______.
A. keeps our mindsharp
B. helps improveour memory
C. gives our braina rest
D. is good forbrain cells communicating with each other
4. In order to keep brain healthy，we should avoid ______.
A. eating a goodlunch B.doing puzzles
C.eating a large supper D.taking aerobic exercise
试题答案
【答案】
1.B
2.D
3.B
4.C
【解析】略